Sink some of DwarfDebug::collectDeadVariables down into DwarfCompileUnit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221010 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfCompileUnit.h

@@ -128,6 +128,8 @@ public:
   constructImportedEntityDIE(const DIImportedEntity &Module);
 
   void finishSubprogramDefinition(DISubprogram SP);
+
+  void collectDeadVariables(DISubprogram SP);
 };
 
 } // end llvm namespace